| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Nguyen, Vu
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (16/16 displayed)
- 2024Advances in Additive Manufacturing of Auxetic Structures for Biomedical Applicationscitations
- 2024Analysis of self-supporting conformal cooling channels additively manufactured by hybrid directed energy deposition for IM toolingcitations
- 2023Advances in Multiscale Modelling of Metal Additive Manufacturing
- 2023Osseointegrability of 3D-printed porous titanium alloy implant on tibial shaft bone defect in rabbit modelcitations
- 2022Directed-energy deposition (DED) of Ti-6Al-4V alloy using fresh and recycled feedstock powders under reactive atmosphere
- 2021Progress Towards a Complete Model of Metal Additive Manufacturingcitations
- 2019Measurement of Laser Absorptivity by Calibrated Melt Pool Simulation
- 2019Residual Stress in Additive Manufacture
- 2018Accelerating Experimental Design by Incorporating Experimenter Hunchescitations
- 2017Modelling Powder Flow in Metal Additive Manufacturing Systems
- 2017A desktop computer model of the arc, weld pool and workpiece in metal inert gas weldingcitations
- 2017Aiming for modeling-assisted tailored designs for additive manufacturingcitations
- 2015A desktop computer model of arc welding using a CFD approach
- 2015Prediction of springback in anisotropic sheet metals: The effect of orientation and frictioncitations
- 2011Modelling die filling in ultra-thin aluminium die castings
- 20113D thermo-mechanical modelling of wheel and belt continuous castingcitations
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article
Directed-energy deposition (DED) of Ti-6Al-4V alloy using fresh and recycled feedstock powders under reactive atmosphere
Abstract
Ti-6Al-4V alloy picks up interstitial elements easily when being manufactured by laser-based additive manufacturing (LBAM), leading to increased yield strength but reduced ductility. This research studies the directed-energy deposition (DED) of Ti-6Al-4V alloy in an argon atmosphere containing 9 to 9500ppm oxygen (from air), using both fresh and recycled feedstock powders. It is found that yield strength and ultimate tensile strength increase and the elongation to fracture decrease with oxygen exposure. When exposed to 3500ppm oxygen containing atmosphere, an oxygen pickup of 1000ppm and a nitrogen pickup of 600ppm is identified for samples built using fresh feedstock powders. However, a yield strength of 1061±0.6MPa and an elongation to fracture of 10.5±1.6% are still obtained. The resulting microstructure for all the samples with oxygen exposure comprises full lamellar α+β, formed through the in-situ decomposition of martensite and/or massive α phase. The α lath thickness is found to increase with oxygen exposure level due to the increased β-transus temperature and martensite start temperature. Oxygen pickup tends to saturate but nitrogen pickup keeps increasing for the air exposure level range investigated. When exposed to argon atmospheres containing similar levels of oxygen, the recycled powder builds are stronger but less ductile than the fresh powder builds. This is due to the smaller average particle sizes of the recycled powders and their larger specific surface area from the DED process, which result in a higher pickup of interstitial elements with no saturation for the air exposure level investigated.